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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.225

Bundled skill extraction verifies existing files instead of failing on them

You'll notice
Useful3 Signal0
Skills

Re-installing a bundled skill over identical existing files now succeeds instead of erroring.

What

Re-extracting a bundled skill over files that already exist succeeds when the contents already match, instead of erroring out on EEXIST.

Details
  • Extraction passes a tolerance option; on EEXIST it opens the existing file, checks it is a regular file and compares its full contents to what would be written.
  • It rethrows only if the contents differ.
  • The 'additional skill files' path uses plain tolerateExisting: !0.
Evidence

tolerateExisting: "verify-content"

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.225 →